Keep showing warning message with no file found

Hi,

I don't know why it keeps to show warning in the console.. Is there any setting for the value of [ISOMORPHIC]?

8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vscroll_end.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vscroll_track_start.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vscroll_start.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vscroll_track.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vthumb_grip.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vscroll_track_end.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vthumb_start.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vthumb_end.png
8月 18, 2014 11:16:07 下午 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /isomorphic/skins/TreeFrog/images/Scrollbar/vthumb_stretch.png

Resolved by adding "<script> var isomorphicDir = "testsmartgwt/sc/"; </script>"